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Title |
Studies for the Comparison of Fire Resistance Performance of GFRP Reinforced and Reinforced Concrete Beams Using Finite Element Method
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Authors |
김희선(Hee Sun Kim) ; 김민희(Min-Hee Kim) ; 이채은(Chae Eun Lee) ; 김나은(Na Eun Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2026.38.3.373 |
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Keywords |
GFRP(Glass Fiber Reinforced Polymer); GFRP 보강근; 화재; 내화; 콘크리트 보 GFRP (Glass Fiber Reinforced Polymer); GFRP rebar; fire; fire resistance; concrete beam |
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Abstract |
This study evaluates thermal and structural behaviors of heated glass fiber reinforced polymer (GFRP) reinforced concrete beams compared to those with reinforced concrete (RC) beam. To this end, transient heat transfer and structural analyses were conducted using finite element method and validated with previously reported test results for temperature distributions and load-bearing capacities of RC beam. The predicted results of temperature distributions showed that the temperature ranges in GFRP rebars were greater than those in steel rebars, while there was not much difference in concrete temperatures regardless of rebar type. In addition, the strength reduction ratio of the heated concrete beams with GFRP rebars was greater than that of heated concrete beam with steel rebars. As the heat exposure duration increased, the strength of GFRP reinforced concrete beams decreased almost linearly. The findings of this study are expected to serve as a reference for establishing testing and evaluation methods, as well as performance-based fire resistance design guidelines for GFRP reinforced concrete beams.
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